Now works with new unitsFixed a bug with reading the line location, correctly centering the line between -3.5 and 3.5 rather than -4 and 3.Also fixed a bug caused by overflow in absolute speeds sent to motor control, which fixed bouncing in line following.

Fixing bugs with ghost scout (these were problems in odometry relatedto constants in the simulator and coordinate frame and theta representationin the simulator). Also made ghost scout translucent in order to differentiateit.